sync-translated-content tool won't sync the case change of slug

[yin1999]

Summary

sync-translated-content tool is not work under slug case sensitive mode, so the slug in translated content may not equal with the one in content.

See

https://github.com/mdn/translated-content/blob/b2cc024aa2e9d361d1f820d435747704ff3999de/files/zh-cn/web/html/element/input/index.md?plain=1#L3

https://github.com/mdn/content/blob/d70965a517f1b66e1b1722430db35b2097b71e3b/files/en-us/web/html/element/input/index.md?plain=1#L3

URL

N/A

Reproduction steps

N/A

Expected behavior

This tool could also sync the case changes of slug.

Actual behavior

N/A

Device

Desktop

Browser

Chrome

Browser version

Stable

Operating system

Windows

Screenshot

No response

Anything else?

No response

Validations

• I have read the Community Participation Guidelines.
• I have verified that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• I have checked that this is a concrete bug. For Q&A open a GitHub Discussion.